RPM7238-H4R Rohm Semiconductor, RPM7238-H4R Datasheet - Page 18
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RPM7238-H4R
Manufacturer Part Number
RPM7238-H4R
Description
Infrared Receivers REMOTE CTRL 37.9KHZ
Manufacturer
Rohm Semiconductor
Specifications of RPM7238-H4R
Carrier Frequency
37.9 KHz
Transmission Distance
15 m
Viewing Angle
45 deg, 35 deg
High Level Pulse Width
800 us
Low Level Pulse Width
800 us
Minimum High Level Output Voltage
2.5 V
Output Current
2 mA
Operating Voltage
2.7 V to 3.6 V
Supply Current
300 uA
Maximum Operating Temperature
+ 75 C
Minimum Operating Temperature
- 10 C
Package / Case
RSIP-A3
Sensing Distance
15m
B.p.f. Center Frequency
37.9kHz
Voltage - Supply
2.7 V ~ 3.6 V
Current - Supply
500µA
Orientation
Top View
Mounting Type
Through Hole
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
RPM7238-H4R
Manufacturer:
ROHM
Quantity:
12 000
Part Number:
RPM7238-H4R
Manufacturer:
ROHM/罗姆
Quantity:
20 000
Transmission
Receiving
• Transmission Pulse Width
• Countermeasure against Dispersion of Receiving Output Pulses
Specifications of output pulse width of Remote Control Receiver Module (Transmission pulse width: 600µs)
Transmission pulse width (ON/OFF): Both 200µs
Take the transmission pulse width as wide as possible (for both ON and OFF periods)
Transmission pulse
Receiving pulse
In the worst case, the dispersion pulse range of output may be 0 to 400µs
and no receiving may be possible.
600µs
T
ON
Fig. 15
600µs
1200
1000
T
800
600
400
200
OFF
Fig. 17 Output ON Pulse Width vs. Transmission Burst Length
0
0
of RPM7100-Hx/RPM7200-Hx
ON period OFF period
A dispersion range of ±200µs
of the transmission signal
200
200µs
400
Transmission burst length (µs)
16
Fig. 16
600
200µs
The receiving output pulse fluctuate ±200µs
according to the transmission signal.
Output pulse
T
800
ON
width
/T
Precautions for Designing Transmitter Side
OFF
1000
MIN
400
1200
600
TYP
MAX
800
Unit
µs